PC Magazine recently conducted a new round of speed tests for 3G and 4G services offered by cell phone carriers. The result is a clean sweep for Verizon Wireless, whose LTE service is faster in all the markets tested. In some cases, AT&T LTE was nipping on Verizon's heels. Check out the results for your region here
http://www.pcmag.com/article2/0,2817,2405597,00.asp
One interesting note is that LTE service is available primarily in metropolitan areas. Suburban and rural areas are not yet covered by LTE. T-Mobile has upgraded almost all of its network to 42 Mbit/second HSPA+, so if you're away from the city center, you may find T-Mobile provides the fastest service. T-Mobile's coverage in rural areas is not as extensive as Verizon or AT&T, so if you're really in the boondocks, T-Mobile may not be the answer.
http://www.pcmag.com/article2/0,2817,2405597,00.asp
One interesting note is that LTE service is available primarily in metropolitan areas. Suburban and rural areas are not yet covered by LTE. T-Mobile has upgraded almost all of its network to 42 Mbit/second HSPA+, so if you're away from the city center, you may find T-Mobile provides the fastest service. T-Mobile's coverage in rural areas is not as extensive as Verizon or AT&T, so if you're really in the boondocks, T-Mobile may not be the answer.